In order to study the flexural performance of high strength reinforced concrete beam, through the loading test of six groups of specimens, investigate its force deformation characteristic. Test shows that the high-strength steel has very notable significance to improve the bearing capacity of the beam. The yield deflection and breakage load of the beam are also gradually increased with the continuous enhancement of the steel strength. Calculate the periodical value of load and deflection of the concrete beams according to the code and simplified M N calculation method. After the comparative analysis of the test results, amend the calculation formula for the deflection of yield and breakage of high strength reinforced concrete beam. And the calculation results coming from the amended formula are in good agreement with the experimental results.
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